Until this latest deployment, I always assumed the purpose of the National Guard was to provide for the defense of the United States–and by defense, I mean defense. Not going off to stop threats in foreign lands, but rather actually having military forces within the borders of the U.S. that can respond to direct attacks upon our homeland (i.e., let the regular Army go invade Vietnam, but make sure you leave the National Guard at home just in case the Russkies decide to invade while 75% of your troops are distracted in Southeast Asia).
By this reckoning, I’ve always considered the use of the National Guard overseas–esp., as it appears to me now, as a permanent supplement to active-duty troops–irresponsible and unwise.
However, I’ve recently heard people argue that the Guard is not intended for homeland defense, but rather is meant to be part of ANY major military action: The idea being that the burden such a deployment places on the Guard members, their families, employers, and communities is intentionally so great that it will help to serve as a check on frivolous military adventures. (The alternative being that the regular military–much expanded to compensate for having no Guard troops at its disposal–would be more likely to be used, and we’d be getting involved in even more conflicts.)
But this, while perhaps true, seems like justification after the fact. What do people here think the Guard’s purpose is and should be?